Combined water boiler and beverage infuser



April 18, 1939.

- G. HEGWEIN COMBINED WATER BOILER AND BEVERAGE INFUSER Filed Feb. 26, 1958 g .32 F 6 v 3,3 Z? a 3/ -I UNITED STATES PATENT OFFICE COMBINED WATER BOILER AND BEVERAG INFUSER Georg Hegwein, Dessau, Germany, assignor t Junkers & 00. G. in. b. H., Dessau, Germany Application February 26, 1938, Serial No. 192,859 I In Germany March 1, 1937 7 Claims. (01. 53-3) This invention relates to a waterlboiler having Moreover the closing of the free outlet solely by an infuser for making coffee, tea or other bevermeans of a spring-loaded safety or relief valve ages combined therewith. has the advantage that if, when the water is According to the invention the draw-off pipe passed to the infuser it should meet with exconnecting the boiler with the infuser is pro cessive resistance to flow for example as the result vided with a device which can be operated either of obstruction in the infuser the heater cannot to pass the water into the infuser or to pass it become suddenly subjected to undue pressure to another outlet as hereinafter described. In a since the water will then flow, through the springpreferred arrangement the infuser is carried by loaded valve. to the other outlet.

10 means such as a pivoting arm, the swinging of To enable the invention to be fully understood 1t) which controls the operation of the water diit will now be described with reference to the verting device. accompanying drawing in which:

This preferred arrangement has inter alia, the Pig. 1 represents a typical partly diagrammatic advantage that domestic boilers of the kind embodiment of one form of the invention and largely used in households and generally mounted Fig. 2 is a section on the line 11-11 of Fig. l. 15

over a draining board or the like can at a very As shown, l0 denotes the water tank of the slight expense by replacing the usual draw-off heater, the fresh water from the cold water pipe cock be made to serve as coffee making machines H being admitted through a pressure regulator for example in addition to their other uses. Ac- I3 and float valve l4 when the cold water cock cording to requirements the water diverting de- I2 is turned on. The boiling water is delivered 90 vice can be moved to one of two positions so that to the outlet nozzle 16 through a syphon IS the water can either be drawn on direct or dipping into the tank In. A cold water pipe I! allowed to flow through the infuser. branching from the supply pipe II also leads to In the case of liquid heaters of the type the water outlet. The pressure regulator [3 also wherein on starting up the water runs-cold at serves for automatically opening the gas valve I8 25 first and does not boil until the heater-has been controlling the supply of gas to the burner l9. on for a certain time, the arrangement accord- The water outlet comprises a casing 20 into which ing to the invention has the advantage that the the hot Water pipe l5 opens, a hollow shaft 2| water can be allowed to run away freely until screwed into the top of the casing and projecting 3o boiling hot and then by actuating the diverting below same, a fixed sleeve 22 with a slide-valve $0 device, for example by swingingthe pivotal arm, port 23 and a rotatable valve .24 adapted to it can be passed through the infuser. In liquid turn on the sleeve 22 and having a lateral openheaters in which the supply of cold water is coning 25 and serving as a spigot. The valve is trolled by a float valve and in which the boiling held in position by a collar on the hollow shaft water is not discharged until forced through 9. 2| as shown. Secured in the lateral opening 25 35 syphon by the pressure of the steam generated of the rotary valve 24 is a tube 26 serving as on the attainment of boiling temperature, the pivotal arm and provided with a handle 25a. arrangement according to the invention offers a The tube 26 carries the infuser, comprising a further advantage. In such heaters the water cover 21 mounted on the tube 26, and a casing 29 0 diverting device is preferably so arranged that (forming the outlet 28) detachably mounted by when operated it opens or shuts off the passage means of screw threads, bayonet catch or the to the infuser whilst the other water outlet relike and fitted with a strainer 30. The strainer mains in continuous connection with the hot 39, for holding ground coffee, tea or the like is water delivery pipe and is kept closed solely by suspended loosely in the casing 29 and'in screwmeans of a spring-loaded safety or relief valve. ing home the casing 29 is pressed tightly against 4.5 The result thus attained is that the water in the a pack ring 3| p d n t e cover The heater is heated to over 100 C. and a certain interior of the tube 26 communicates with the steam pressure corresponding with the loading infuser through openings 32. A second strainer of the spring is generated. On the opening of 33 is secured to the cover 21 -of the infuser by a the passage to the infuser the pressure on the wing nut 34. The lower outlet of the hollow 50 water is at once relieved, resulting in an increased shaft 2| is closed by a s f y relief v lve 5 generation of steam so that a mixture of boiling loaded by a spring 36. The spring 36 also serves water and steam is passed through the infuser. for securing in the nozzle I6 an interior sleeve 31 This circumstance is of great importance for in such relation to the outer casing 38 of the obtaining a good flavour in the infused beverage. nozzle that an annular space 39 is provided be- 55 -infuser is turned, by means of the pivotal arm 26 into such a position that the passage 23, 25 for the water is closed by the rotary valve 24. The water can then only issue through the other outlet l G and in so doing it must first overcome the pressure of the spring-loaded valve 35. Consequently, the pressure in the tank l0 becomes higherthan in the ease of a perfectly free outflow,

the water thus becoming more highly heated, e. g.,

to about 110 C. owing to the resulting retarded ebullition. During the period of waiting until boiling water flows through the outlet Hi, the infuser can be got ready for use by filling it with ground coffee or the like. The infuser is then swung round so that the rotary valve 24 opens the passage 23, 25 and allows the water to pass to the infuser. Since in so passing the water meets with less resistance than is offered by the spring-loaded valve, this valve closes at once and the boiling water is driven by the steam pressure through the infuser and indeed with' considerable force on account of the temporarily increased generation of steam in the heater as the result of the pressure-relief occurring at that moment. Should the infuser oppose an excessive resistance to the water through being choked withcoffee grounds for example the resulting increase of pressure will be relieved and rendered harmless by the automatic opening of the valve 35.-

When the bottom member 29 of the infuser is detached the infuser can be used as a rinsing spray, the strainer 33 being secured to the cover 21 for that purpose. 3

.Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, I declare that what I claim is:

l. The combination, with a water boiler, of an infuser for making a beverage, means provided with an outlet to atmosphere for discharging water from said boiler tojatmosphere, valve means operable to permit flow of water from said discharge means to said infuser, and a spring loaded safety or relief valve in said discharge means by the pressure of the water only when the infuser is shut off or interposes excessive resistance to flow, of water therethrough.

2. The combination as set out in claim 1 in which the supply of water to said boiler is controlled by a float valve and in which the water discharging means includes a syphon whereby water is not discharged from said boiler until forced through said syphon by the pressure generated in said boiler.

3. The combination as set out in claim 1 in which the'water discharging means includes a discharge pipe and the infuser is connected to said pipe by a pivoted hollow arm-carrying said infuser and by means of which water is delivered to said infuser, said arm also acting as means for actuating said valve means.

4. The combination as set out in claim 1 in which the water discharging means includes a discharge pipe and the infuser .is connected to said pipe by a pivoted tube, provided with a handle, for delivering water from said pipe to said infuser, said valve means comprising a cock which is actuated by swinging movement of said tube.

5. The combination as set out in claim 1 in which the water discharging means includes- "a hollow casing, a hollow shaft detachably connected thereto and providing said outlet to atmosphere, said valve means including a rotatable valve member supported for rotation on said hollow shaft, said rotatable valve member being connected to said infuser by a tube which supports said infuser and delivers water thereto.

6. The combination asset out in claim 1 in which the water discharging means includes a hollow casing, a hollow shaft detachably connected thereto and providing said outlet to atmosphere, a fixed sleeve opening into said casing and surrounding said hollow shaft, said hollow sleeve being provided with a discharge port, a sleeve rotatably mounted on said fixed sleeve and provided with a port adapted to cooperate with the port in said fixed sleeve to constitute said valve means, said rotatable sleeve being provided with a hollow tube supporting said infuser, and delivering water thereto, said tube also acting as means for actuating said rotatable sleeve.

'7. The combination as set out in claim 1 in which the outlet to atmosphere includes a nozzle provided with an internal sleevespaced therefrom to permit water to flow through said internal sleeve and between said sleeve and nozzle, said spring loaded .valve including a spring for holding said inner sleeve in position.

GEORG HEGWEIN. 

